ANSI B16.5 Class 300 Flange dimensions in mm

300# flange bolt chart is used to assist engineers and pipe fitters with calculating the number of fasteners associated according to flange size. A Class 30 300 lb flange dimensions can handle more pressure as compared to a Class 150 flange. This is because Class 300 lb flange dimensions is constructed with more metal and can withstand more pressure. However, there are a number of factors that could impact the pressure capability of an 8 300 lb flange dimensions.

The Pressure Class or Rating for all flanges has to be given in pounds. Different names must be used to indicate a Pressure Class. For example: 300 Lb or 300 Lbs or 300# or Class 300 lb blind flange dimensions, all are the same.

Generally, Steel pipe 300 lb flange gasket dimensions are classified as per ASME B16.5 standard. The pressure rating of these flanges range from 150 # to 2500 #. The term "lb", "class" and "#" are used interchangeably to designate the pressure rating of the 300 lb weld neck flange dimensions. The fact is that 300 lb has no relation to 300 psi pressure rating. Pressure rating of the 300 lb pipe flange dimensions depends on the material used such as A105, stainless, nickel alloy etc. The pressure rating of the 300 lb ansi flange dimensionsalso depends on the heat treat condition and pressure "class".

term "class" used in ansi b16.5 class 300 flange dimensions in mm is to not to be confuse it with pressure "rating". ASME B16.5 Class slip on flange dimensions 300# size ranges from ½ inch (15 NB) to 48 inch (1200NB) or DN10~DN5000. Major types of 300 lb slip on flange dimensions are available in the form of Forged type, Threaded type, Screwed type & Plate type.The 300 lb raised face flange dimensions supporting material includes the use of Ring Joint, Gasket and 28 300 lb flange dimensions Bolts.

Application of the Class 300 lb orifice flange dimensions includes its use in Connecting Pipe & Tubes in industries like Construction, Petroleum, Power, Chemical, Gas, Metallurgy, Shipbuilding etc. The Key markets and industries that use the Class 300 lb long weld neck flange dimensions in their equipment’s are - Nuclear power (mostly seamless), Bitumen upgraders, Heavy oil refineries, as well as Petrochemicals and acids.

Table of Content

300 NB flange specification
ASME B16.5 Class 300 flange dimensions in mm
ASME B16.47 Class 300 flange dimensions in mm
ANSI B16.5 Class 300 forged flange dimensions in inch
Types of ANSI forged flange 300 class
Dimensions of ASME B16.5 Class 300 WNRF (STD)
300 class SWRF flange dimensions in mm
RF ANSI B16.5 class 300 threaded flange dimensions in mm
Dimensions of Raised face 300# lap joint flange in mm
ASME B16.5 300LBS Raised face blind flange (BLRF) dimensions in mm
Dimensions of 300LBS SORF flange
Class 300 socket weld & weld neck flange bore (SCH10 -XXS)
ANSI B16.5 class 300 Weld Neck flange price in India
ANSI B16.5 300# blind flange price list
Price list of ANSI 300 Lap joint flange
Socket weld flange class 300 price list
Latest price of ANSI B16.5 class 300 slip on flange
ASME B16.5 300 NB threaded flange prices
Class 300 flange pressure rating
Bolt chart of Class 300 forged steel flanges

300 NB flange specification

View pressure rating, bolt chart and price of 300 Lb blind, slip on and weld neck flanges

ANSI flange meaning & full form	Construction of forged steel flanges meets specification of American National Standards Institute (ANSI)
Manufacturing size range of Manifold	1/2" to 72" 15NB – 1200NB PN 2.5 – PN 400
Types of ANSI flanges	Reducing flange Weld neck flanges Blind flanges Slip on flanges Lap joint flanges Threaded flanges Socket weld flanges
Class 300 flange in bar	300 psi (20.6 bar)
ASTM standard of stainless steel	ASTM A182 / ASME SA182
ASTM standard of carbon steel ANSI flange	ASTM A105 / ASME SA105 / ASTM A350 / ASME SA350
Testing & inspection	X-ray detector UI trasonic flaw detector Direct-reading Spectrograph Magnetic particle detector Hydrostatic testing machine
MTC	EN 10204 3.1 and EN 10204 3.2 / NACE MR0103 / NACE MR0175
Shipping locations	Dubai, Peru, Egypt, Korea, Ireland, USA, Indonesia, Spain, Singapore, Canada, Ukraine, Thailand, Iran, Oman, Brazil, Saudi Arabia etc

ASME B16.5 Class 300 flange dimensions in mm

Find here 300# Flange Bolt Chart, 300#, Slip On Flange Dimensions 8, 28 and 30 300 Lb Flange Dimensions as per ASME B16.5

NPS (inches)	O	Q*	No. and** Dia of Bolt Holes	R	X	YY*	H	Bolt Circle Dia.	J	Y*	YV	B	R	C	BB	Z	T
1/2	3.75	0.56	4-0.62	1.38	1.50	2.06	0.84	2.62	0.62	0.88	0.88	0.88	0.12	0.93	0.90	0.38	0.62
3/4	4.62	0.62	4-0.75	1.69	1.88	2.25	1.05	3.25	0.82	1.00	1.00	1.09	0.12	1.14	1.11	0.44	0.62
1	4.88	0.69	4-0.75	2.00	2.12	2.44	1.32	3.50	1.05	1.06	1.06	1.36	0.12	1.41	1.38	0.50	0.69
11/4	5.25	0.75	4-0.75	2.50	2.50	2.56	1.66	3.88	1.38	1.06	1.06	1.70	0.19	1.75	1.72	0.56	0.81
11/2	6.12	0.81	4-0.88	2.88	2.75	2.69	1.90	4.50	1.61	1.19	1.19	1.95	0.25	1.99	1.97	0.62	0.88
2	6.50	0.88	8-0.75	3.62	3.31	2.75	2.38	5.00	2.07	1.31	1.31	2.44	0.31	2.50	2.46	0.69	1.12
21/2	7.50	1.00	8-0.88	4.12	3.94	3.00	2.88	5.88	2.47	1.50	1.50	2.94	0.31	3.00	2.97	0.75	1.25
3	8.25	1.12	8-0.88	5.00	4.62	3.12	3.50	6.62	3.07	1.69	1.69	3.57	0.38	3.63	3.60	0.81	1.25
31/2	9.00	1.19	8-0.88	5.50	5.25	3.19	4.00	7.25	3.55	1.75	1.75	4.07	0.38	4.13	4.10		1.44
4	10.00	1.25	8-0.88	6.19	5.75	3.38	4.50	7.88	4.03	1.88	1.88	4.57	0.44	4.63	4.60		1.44
5	11.00	1.38	8-0.88	7.31	7.00	3.88	5.56	9.25	5.05	2.00	2.00	5.66	0.44	5.69	5.69		1.69
6	12.50	1.44	12-0.88	8.50	8.12	3.88	6.63	10.62	6.07	2.06	2.06	6.72	0.50	6.75	6.75		1.81
8	15.00	1.62	12-1.00	10.62	10.25	4.38	8.63	13.00	7.98	2.44	2.44	8.72	0.50	8.75	8.75		2.00
10	17.50	1.88	16-1.12	12.75	12.62	4.62	10.75	15.25	10.02	2.62	3.75	10.88	0.50	10.88	10.92		2.19
12	20.50	2.00	16-1.25	15.00	14.75	5.12	12.75	17.75	12.00	2.88	4.00	12.88	0.50	12.94	12.92		2.38
14	23.00	2.12	20-1.25	16.25	16.75	5.62	14.00	20.25	To Be Specified by Purchaser	3.00	4.38	14.14	0.50	14.19	14.18		2.50
16	25.50	2.25	20-1.38	18.50	19.00	5.75	16.00	22.50		3.25	4.75	16.16	0.50	16.19	16.19		2.69
18	28.00	2.38	24-1.38	21.00	21.00	6.25	18.00	24.75		3.50	5.12	18.18	0.50	18.19	18.20		2.75
20	30.50	2.50	24-1.38	23.00	23.12	6.38	20.00	27.00		3.75	5.50	20.20	0.50	20.19	20.25		2.88
24	36.00	2.75	24-1.62	27.25	27.62	6.62	24.00	32.00		4.19	6.00	24.25	0.50	24.19	24.25		3.25

ASME B16.47 Class 300 flange dimensions in mm

Nom Size	OD	BLRF	WNRF	OD of RF	Diameter at Base	Diameter Bevel	LTH	Bolt Circle	Bolt Length	Hole Diameter	# of Holes	BLRF	WNRF
	O	C	C	R	X	A	Y		(1)	(2)
26	38.25	3.25	3.07	29.5	28.38	26	7.19	34.5	10.75	1.75	28	1078	605
28	40.75	3.5	3.32	31.5	30.5	28	7.69	37	11.25	1.75	28	1315	745
30	43	3.69	3.57	33.75	32.56	30	8.19	39.25	12	1.88	28	1543	870
32	45.25	3.88	3.82	36	34.69	32	8.69	41.5	12.5	2	28	1795	1005
34	47.5	4.07	3.94	38	36.88	34	9.07	43.5	13	2	28	2068	1145
36	50	4.32	4.07	40.25	39	36	9.44	46	13.5	2.12	32	2436	1275
38	46	4.19	4.19	40.5	39.12	38	7.06	43	12.5	1.62	32	2001	695
40	48.75	4.44	4.44	42.75	41.25	40	7.56	45.5	13.25	1.75	32	2380	840
42	50.75	4.63	4.63	44.75	43.25	42	7.82	47.5	13.75	1.75	32	2688	950
44	53.25	4.82	4.82	47	45.25	44	8.06	49.75	14.25	1.88	32	3079	1055
46	55.75	5	5	49	47.38	46	8.44	52	15	2	28	3499	1235
48	57.75	5.19	5.19	51.25	49.38	48	8.75	54	15.25	2	32	3896	1380
50	60.25	5.44	5.44	53.5	51.38	50	9.07	56.25	16	2.12	32	4442	1530
52	62.25	5.63	5.63	55.5	53.38	52	9.32	58.25	16.5	2.12	32	4906	1660
54	65.25	5.94	5.94	57.75	55.5	54	9.88	61	17.5	2.38	28	5684	2050
56	67.25	6	6	59.75	57.62	56	10.19	63	17.75	2.38	28	6098	2155
58	69.25	6.19	6.19	62	59.62	58	10.44	65	18	2.38	32	6669	2270
60	71.25	6.38	6.38	64	61.62	60	10.69	67	18.5	2.38	32	7274	2470

Note: Bore "B" Specified by client

ANSI B16.5 Class 300 forged flange dimensions in inch

NPS	O	R	X	T	T_J	Bolt Circle Diameter	#/Diameter of Holes^a	H	B	B₂^b	B₃	r	L	L₂	L₃^c	D	C	Thr
½	3.75	1.38	1.50	0.50	0.56	2.62	4-0.63	0.84	0.88	0.62	0.90	0.12	0.81	2.00	0.88	0.38	0.93	0.62
¾	4.62	1.69	1.88	0.56	0.62	3.25	4-0.75	1.05	1.09	0.82	1.11	0.12	0.94	2.19	1.00	0.44	1.14	0.62
1	4.88	2.00	2.12	0.62	0.69	3.50	4-0.75	1.32	1.36	1.05	1.38	0.12	1.00	2.38	1.06	0.50	1.41	0.69
1¼	5.25	2.50	2.50	0.69	0.75	3.88	4-0.75	1.66	1.70	1.38	1.72	0.19	1.00	2.50	1.06	0.56	1.75	0.81
1½	6.12	2.88	2.75	0.75	0.81	4.50	4-0.88	1.90	1.95	1.61	1.97	0.25	1.13	2.63	1.19	0.62	1.98	0.88
2	6.50	3.62	3.31	0.81	0.88	5.00	8-0.75	2.38	2.44	2.07	2.46	0.31	1.25	2.69	1.31	0.69	2.50	1.12
2½	7.50	4.12	3.94	0.94	1.00	5.88	8-0.88	2.88	2.94	2.47	2.97	0.31	1.44	2.94	1.50	0.75	3.00	1.25
3	8.25	5.00	4.62	1.06	1.12	6.62	8-0.88	3.50	3.57	3.07	3.60	0.38	1.63	3.06	1.69	0.81	3.63	1.25
3½	9.00	5.50	5.25	1.12	1.19	7.25	8-0.88	4.00	4.07	3.55	4.10	0.38	1.69	3.13	1.75	….	4.13	1.44
4	10.00	6.19	5.75	1.19	1.25	7.88	8-0.88	4.50	4.57	4.03	4.60	0.44	1.82	3.32	1.88	….	4.63	1.44
5	11.00	7.31	7.00	1.31	1.38	9.25	8-0.88	5.56	5.66	5.05	5.69	0.44	1.94	3.82	2.00	….	5.69	1.69
6	12.50	8.50	8.12	1.38	1.44	10.62	12-0.88	6.63	6.72	6.07	6.75	0.50	2.00	3.82	2.06	….	6.75	1.81
8	15.00	10.62	10.25	1.56	1.62	13.00	12-1.00	8.63	8.72	7.98	8.75	0.50	2.38	4.32	2.44	….	8.75	2.00
10	17.50	12.75	12.62	1.81	1.88	15.25	16-1.12	10.75	10.88	10.02	10.92	0.50	2.56	4.56	3.75	….	10.88	2.19
12	20.50	15.00	14.75	1.94	2.00	17.75	16-1.25	12.75	12.88	12.00	12.92	0.50	2.82	5.06	4.00	….	12.94	2.38
14	23.00	16.25	16.75	2.06	2.12	20.25	20-1.25	14.00	14.14	13.25	14.18	0.50	2.94	5.56	4.38	….	14.19	2.50
16	25.50	18.50	19.00	2.19	2.25	22.50	20-1.38	16.00	16.16	15.25	16.19	0.50	3.19	5.69	4.75	….	16.19	2.69
18	28.00	21.00	21.00	2.31	2.38	24.75	24-1.38	18.00	18.18	17.25	18.20	0.50	3.44	6.19	5.12	….	18.19	2.75
20	30.50	23.00	23.12	2.44	2.50	27.00	24-1.38	20.00	20.20	19.25	20.25	0.50	3.69	6.32	5.50	….	20.19	2.88
22	33.00	25.25	25.25	2.57	2.63	29.25	24-1.63	22.00	22.22	21.25	22.25	0.50	3.93	6.43	5.75	….	22.19	3.13
24	36.00	27.25	27.62	2.69	2.75	32.00	24-1.63	24.00	24.25	23.25	24.25	0.50	4.13	6.56	6.00	….	24.19	3.25

Types of ANSI forged flange 300 class

View Available 300 Lb Pipe Flange Dimensions, Class 300 Flange Pressure Rating, 300 Lb Slip On Flange Dimensions

ASME B16.5 Class 300 slip on flange

300 NB blind flange

300# weld neck flange

ANSI B16.5 CL 300 threaded flange

Class 300 socket weld flange

ASME B16.5 300LBS lap joint flange

Dimensions of ASME B16.5 Class 300 WNRF (STD)

300 class SWRF flange dimensions in mm

Check Class 300 Ansi forged flange & 300 Lb Long Weld Neck Flange Dimensions

300 class SWRF flange dimensions in mm

RF ANSI B16.5 class 300 threaded flange dimensions in mm

Dimensions of Raised face 300# lap joint flange in mm

ASME B16.5 300LBS Raised face blind flange (BLRF) dimensions in mm

Dimensions of 300LBS SORF flange

Class 300 socket weld & weld neck flange bore (SCH10 -XXS)

ANSI B16.5 class 300 Weld Neck flange price in India

Product	US $	Saudi Arabia (SAR)	South africa (ZAR)
ASTM A105N FLANGES WNRF 36" SCH STD RF CLS 300	$2,573.42	9650.35 SAR	48694.64 ZAR
FLANGES WELDNECK 30" SCH STD CLS 300 ASTM A105N RAISED FACE	$1,755.98	6584.94 SAR	33226.92 ZAR
ASTM A105N WELD NECK FLANGES 24" SCH STD CLS 300 RF	$1,362.40	5109.01 SAR	25779.54 ZAR
ASTM A350 LF2 WELDNECK FLANGES 24" SCH 80 RF CLS 300	$1,176.50	4411.89 SAR	22261.91 ZAR
A350 LF2 FLANGES WNRF 24" SCH 40 RF CLASS 300	$1,045.49	3920.60 SAR	19782.92 ZAR

ANSI B16.5 300# blind flange price list

Product	US $	Saudi Arabia (SAR)	South africa (ZAR)
ASTM A182 GRADE F51 BLIND FLANGES 20" CLS 300 RF	$5,068.27	19006.07 SAR	95902.57 ZAR
ASTM A105 FLANGES BLIND 24" RF CLASS 300	$2,127.62	7978.60 SAR	40259.14 ZAR
ASTM A182 GRADE F51 BLRF FLANGES 14" CLS 300 RF	$1,904.09	7140.36 SAR	36029.48 ZAR
A350 LF2 BLIND FLANGES 24" RF CLASS 300	$1,245.36	4670.11 SAR	23564.89 ZAR
ASTM A350 LF2 FLANGES BLIND 20" RF CLS 300	$812.66	3047.48 SAR	15377.27 ZAR

Price list of ANSI 300 Lap joint flange

Product	US $	Saudi Arabia (SAR)	South africa (ZAR)
ASTM A182 GRADE F51 SS FLANGES LAP JOINT 1.1/2" CLASS 300	$66.03	247.61 SAR	1249.43 ZAR

Socket weld flange class 300 price list

Product	US $	Saudi Arabia (SAR)	South africa (ZAR)
ASTM A182 F316 FLANGES SOCKET WELD 2" SCH 40S CLS 300 RF	$37.50	140.63 SAR	709.58 ZAR
ASTM A182 GRADE F304 SOCKET WELD FLANGES 1.1/2" CLS 300 SCH 10S RF	$34.40	129.00 SAR	650.92 ZAR
A182 F304L FLANGES SWRF 1.1/2" SCH STD CLS 300 RF SS	$34.06	127.73 SAR	644.49 ZAR
ASTM A182 F304 SOCKETWELD FLANGES 1" SCH STD CLS 300 RF SS	$23.84	89.40 SAR	451.10 ZAR
A182 F316L FLANGES SWRF 1.1/2" SCH 40S CLS 300 RF	$18.61	69.79 SAR	352.14 ZAR

Latest price of ANSI B16.5 class 300 slip on flange

Product	US $	Saudi Arabia (SAR)	South africa (ZAR)
ASTM A105N FLANGES SLIP ON 20" CLS 300 RAISED FACE	$432.84	1623.15 SAR	8190.26 ZAR
A105N FLANGES SORF 18" CLASS 300 RAISED FACE	$386.81	1450.54 SAR	7319.28 ZAR
ASTM A350 LF2 FLANGES SLIP ON 16" CLS 300 RF	$370.20	1388.25 SAR	7004.98 ZAR
ASTM A105N FLANGES SLIP ON 14" CLASS 300 RAISED FACE	$262.41	984.04 SAR	4965.36 ZAR
ASTM A182 F316 FLANGES SORF 4" CLS 300 RF	$67.66	253.73 SAR	1280.27 ZAR

ASME B16.5 300 NB threaded flange prices

Product	US $	Saudi Arabia (SAR)	South africa (ZAR)
ASTM A182 304L FLANGES THREADED 3/4" CLS 300 RAISED FACE	$13.87	52.01 SAR	262.45 ZAR
ASTM A182 F304 THREADED FLANGES 1" CLS 300 RF	$16.77	62.89 SAR	317.32 ZAR
ASTM A105N FLANGES THREADED 2" CLASS 300 FLAT FACE	$11.47	43.01 SAR	217.04 ZAR
ASTM A350 LF2 FLANGES THREADED 1.1/2" CLS 300 RAISED FACE	$10.37	38.89 SAR	196.22 ZAR
ASTM A182 F316 THREADED FLANGES 1/2" CLASS 300 RF	$9.87	37.01 SAR	186.76 ZAR

Class 300 flange pressure rating

Pressure rating Of Carbon Steel Flanges

The Table Shows The Maximum Pressure In PSI ASTM A105 / ASTM A350 LF2 / ASTM A350 LF3 / ASTM A350 LF6

Temperature (in F°)	300#
100	740
200	680
300	655
400	635
500	605
600	570
650	550
700	530
750	505
800	410
850	320
900	230
950	135
1000	85
Hydrostatic Test Pressure (psig)	1125

TEMP C°	300#
-29 / 38	51.1
50	50.1
100	46.6
150	45.1
200	43.8
250	41.9
300	39.8
325	38.7
350	37.6
375	36.4
400	34.7
425	28.8
450	23
475	17.4
500	11.8
538	5.9

Flanges Pressure Rating in Bars ANSI flanges (ASTM A182 F304L / ASTM A182 F316L)

TEMP C°	300#
-29 TO 38	41.4
50	40
100	34.8
150	31.4
200	29.2
250	27.5
300	26.1
325	25.5
350	25.1
375	24.8
400	24.3
425	23.9
450	23.4

Bolt chart of Class 300 forged steel flanges

300 LB. Flanges
# Bolts or Studs	Dia of Bolts or Studs	Length of Stud
		1/16 RF
4	0.50	2-1/2
4	0.63	3
4	0.63	3
4	0.63	3-1/4
4	0.75	3-1/2
8	0.63	3-1/2
8	0.75	4
8	0.75	4-1/4
8	0.75	4-1/4
8	0.75	4-1/2
8	0.75	4-3/4
12	0.75	4-3/4
12	0.88	5-1/2
16	1.00	6-1/4
16	1.13	6-3/4
20	1.13	7
20	1.25	7-1/2
24	1.25	7-3/4
24	1.25	8
24	1.50	9